Volume Holographic Optical Storage Nanotechnology
Michael E. Thomas
Colossal Storage Corporation, Fremont California
http://www.colossalstorage.net
Michael E. Thomas has patents which he has licensed to Colossal Storage Corp. on new ways of non - contact reading and writing with non-destructive reading of information to a ferroelectric optical perovskite dipole high - k dielectric molecule. These methods will be used to develop the worlds first 3 D Volume Holographic optical mass storage device. U.S. Patents, # 6,028,835 2/00 and # 6,046,973 4/00 for an integrated read/write head for ferroelectric optical media.Introduction
The Volume (3 D) Holographic Optical Drive technology plans to push future storage densities of optical mass storage over 40,000 Terabits/cu.cm. A comparison with magnetic hard drives of today is around at 60 gigabits. Optically assisted drives at 45 gigabits/sq.in. and contact recording AFM, STM, SPM or SFM, i.e. atomic force microscope and their derivatives, at about 300 gigabits/sq.in..
3 D Volume Holographic Mass Data Storage
The holographic optical drive will use the Einstein/Planck Theory of Energy Quantum Electrons to control molecular properties by an atoms electron movement/displacement. The Patented Semiconductor Integrated Optical Read / Write Head Fig. 1 plans to use Ultraviolet/Blue laser diodes with Voltage transducer to write, new definition of term include photon/laser induced electrical field poling Fig. 2, and UV/Blue laser diode and Nanooptical transistor or Nanofloating gate Mos Fet to read. Research and development on techniques and functions for controlling ferroelectric perovskite's dipole dielectric properties write, erase and storage states in nanocrystal memories will need to be created. The techniques developed would be for fast read/write control of ferroelectric molecules, which have an almost infinite storage persistence of data. Increasing areal densities and data transfer rates of data between the random mass storage device to system requirements will increase mass storage bandwidth needs.
A Method for Reading/Writing 3 D Volume Holographic
The method of reading/writing offers probably the highest potential of data storage by interference diffraction of light photons having both positive and negative index of refraction from the internal atoms of the molecule Fig 6. Colossal's photon/laser induced nanowave/microwave electric field poling allows for the writing of 3D volume data when read back having coherent interference waves in a beam of radiation at a single frequency causing a bright or dark band, caused by beams of light that are in phase or out of phase with one another due to diffraction by the bistable state nucleus in the center of ferroelectric molecule. The signal to noise ratios would be higher and the data transfer bandwidth theoretically capable of reaching over 200 Terabits/sq.in. By using the internal dipole (2 electrical states - molecular switch) atomic structure of the ferroelectric molecule, Colossal Storage can offer a non destructive read from the dipole molecule. By reading the interference patterns (light and dark lines on the photo transistor or diode and comparing the patterns against systems stored hologram patterns extremely fast bandwidths of 10 gigabits and up can be easily achieved Fig 3. Writing to the molecule using UV laser source diode at 1x10 15th hz and an data transfer electric field transducer at 100 gigahertz and higher is still non volatile with the addition of the second laser diode as an option for assisted writing power if necessary Fig 5,8. Reading of page stored data allows for reading of 400 molecules (data bits) per 200 nanometer UV photon spot or 50,800,000 bpi and track densities exceeding 25,000,000 tpi Fig 7.
Molecular dissociation following Thomas' patents cover methods for a non-contact photon induced electric field poling using UV space charge fields at the same wavelength as a molecular transition will create controllable clouds of electrons in harmonic waves (Plasmon). Some organic/inorganic molecules have resonant valence orbit electrons that under the proper UV space charge field photo excitation will allow polarized conduction band electrons to move freely for a short time (popular inversion). Plasmon known as spin polarized electric current along with the electric field present provide a mechanism for ferroelectric perovskite molecules to switch binary positions. The unique concept of resonant absorption excitation by UV/Blue laser light illumination causing molecular dissociation and simultaneous electric field application ( Pockels effect ) can be used for writing 2D Area or 3D volume data so when it is read back having coherent interference waves in a beam of Soliton Wave photon radiation (below popular inversion).
The single frequency below popular inversion creates many bright or dark bands from the UV light that are in phase or out of phase with one another. The diffraction of the Soliton Wave by the bistable state nucleus in the center of ferroelectric dipole molecule can therefore be represented as a binary 0 or 1 having either positive or negative index of refraction.
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The dipoles electrical polarity of the ferroelectric molecule physically changes the interference, diffraction, surface morphology/topography, opacity, fluorescence, iridescence, opalescence and Extremely small laser spots of 300 angstroms and less can be written and read using integrated optical head structure with densities of 40 gigabits sq.in. to over 40,000 Terabits cu.cm. being realized. In all of the discussion PZT is shown for simplicity of presentation but it is assumed other ferroelectric molecules (lithium niobate, lithium tantalate, BST, SBT, many others) will be investigated for their optical storage properties as it applies to Colossal Storage Patents.

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Fig. 8
Theoretical Density calculation for Volume Storage
The 3D device will be able to read 1.5 million 300 or less nM spots in typical 5 in. disk with 18 inches circumference (one track). Data in (1) 300 or less nMeter spot ( this is instantaneous data in parallel read format, reading much faster than writing), (X)dimension 400 ferroelectric molecules (Fe Moles) times (Y)dimension 400 moles times (Z)dimension 100 moles equals 16,000,000 bits read per 300 or less nMeter spot. 1.5 x 10 to 6th (300 nMeter) spots times 16,000,000 bits per spot equals 24,000,000,000,000 bits read in one revolution on one track of the disk. Reading of page stored data allows for reading of 400 molecules (data bits) per 200 nanometer UV photon spot or 50,800,000 bpi and track densities exceeding 25,000,000 tpi.
Related Work
Optical disk drives of today use laser light and a wide array of objective, polarizing, and newly invented solid immersion lens (SIL). Laser light and photon characteristics have allowed data storage peripherals to store enormous amounts of data. Sometimes the data written could only be written once, on magno-optical drive that data could be rewritten a limited amount of times by raising the temperature of the entire track and thereby causing an erasure of data. The latest means for increasing areal densities are done by a multitude of lens arrays finally feeding into a solid immersion lens (SIL). Using single or multiple layers of recording magnetic media within a fraction of a wavelength distance from the SIL or VSAL head base. The electrons of the ferromagnetic material take on a (clock wise rotation)-north magnetic polarity or (counter clock wise rotation)-south magnetic polarity. When an infrared photon of the right energy level hits the ferromagnetic electrons it is reflected, whereby the infrared photon takes on a light polarization property, which can be measured, the KERR effect. A focused infrared spot is obtained at the base of the SIL head (Terastor) (Quantum) (Imation/3M), out of business. While (Quinta) (Seagate) (Read-Rite), Out of Business, use a very small aperture lens (VSAL) method of technology for ferroelectric photon optical storage reads using the BRAGG effect and writes data using a Contact Write Electrode. Siros Technology (Lucent & Bell Labs & Imation), and IBM & Bayer Chemicals WORM Holograph Storage, another futuristic drive type C3D can only read the luminescence off its multi-layered media by Compton Scattering.
Future Work
The applications for the semiconductor holographic optical read/write head for ferroelectric media are still evolving and encompass much more than just data storage. The semiconductor read/write head for ferroelectric molecular electrostatic field random reorientation can be used for many more applications than data storage, examples might be, high speed imaging and offset printing, lithography, copiers, and printers. Future integrated circuits could be made and verified that have ferroelectric wiring 1 molecule wide with the ability to polarize the wire for new switching, molecular optical wire, logic state definitions, and I/O Data Transfers states. Ferroelectric interconnects could do it cheaper, with less power, and in much higher densities.
http://www.colossalstorage.net/colossal12.htm
Research and Development Unknowns
The Colossal Storage Holographic drive predicts improvements in all area of mass data storage with many research and development issues unknown, for example,
What is the optimum ferroelectric ceramic crystal molecule for UV/blue laser diode frequency and quantum energy needed to cause electron movement from valence to conduction band?
What is the necessary field strength to cause electron movement in ferroelectric molecule to cause perovskite dipole switching?
What is complexity for holographic pattern recognition database needed for storage data content management.
What is the optimum head to media spacing?
What is the minimum and maximum linear or radial velocity of the media to head?
What is the optimum read non-destruct laser UV/blue frequency and quantum energy?
What is the angle of the 2nd read laser led?
What are the light/photon characteristics of diffraction, refraction, interference, etc. from/to the ferroelectric ceramic crystal molecule?
What are the characteristic of the photo diode and the mosfet read components?
What are the maximum track densities, 700,000 and higher?
What is the maximum and minimum nanowave / microwave frequencies for the electric field write tranducer?
What are the possibilities for complex encrypted multiple bit storage?
Is MOCVD the best way to deposit ferroelectric perovskite molecules on a substrate of glass, metal, ceramic, or plastic?
What type of binder and overcoat is needed?
What conditions will need to be optimized for spindle motor noise?
What type of hydromics for media enclosure, what pressure, exotic air mixtures needed?
What are the maximum allowable temps shocks humidity ranges?
What is the maximum signal to noise ratio and is it possible to go further than 200 Tbits/sq.in.? or 40,000 cu.cm.
What is the maximum sustained burst data transfer rates? Over 100 Gbits/sec ?
These and hundreds of other questions will need to be answered for the future 3 D Volume Ferroelectric Molecular Holographic Optical Storage Device to become a successful storage device competing in tomorrows market place.
Conclusions
The future Ferroelectric Volume Holographic Optical Drive will offer symmetrical infinite double sided disk or tape non-destructive read and writes for the retention of data storage for 100 years or more with drive densities over 40,000 Terabits/cu.cm. and up. This will allow the holographic optical nanotechnology drive to hold more data than any other type of drive and deliver data much faster. The patents on a semiconductor read/write head for ferroelectric optical storage media memories promises to raise data storage densities by a factor of 1000 or more. Volume 3D Holographic Data Storage and will add at least 10,000 times the data storage capacity per peripheral storage footprint and will increase data transfer rates bandwidth over 1,000 times compared to magnetic storage technology.
References
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